Lumbar support cushion



FIG. 1 is a perspective view of a lumber support cushion showing our new design in use. The broken-line showing of environmental structure is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a perspective view of a lumbar support cushion showing our new design;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof, the left side being a mirror image thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a lumbar support cushion, as shown and described. 